Rain and warmer weather created a slushy mess on roadways Friday and raised concerns about roof collapse dangers.

There were several reports of cars off the roads during the morning commute.

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"Early this morning, we had a few icy conditions, but we had the trucks out all night long," said James MacNichol of the Department of Transportation.

DOT crews in Nashua were called in around 9 p.m. Thursday. They thought they would be plowing, but the rain changed their plans.

"The basins get all clogged up with snow and all that, so we'll be out shoveling basins," MacNichol said.

It was a similar situation in Derry. Crews were out making sure that the water had some place to go. But the recent heavy snow meant they first had to find them.

"We have crews that are out there right now with loaders and metal detectors trying to find the tops of catch basins," said Mike Fowler, Derry public works director. "The town of Derry has about 3,200 catch basins."

The recent storms proved too much for a mobile home in Derry. The homeowner, in his 80s, was there when the roof gave way.

"He had heard the roof beginning to sag," said fire Battalion Chief Jack Webb. "His situation was due to the snow load and the age of his mobile home, which was 46 years old."

Resident Donna Crocker's roof is still intact, but she was worried.

"When I came back, I just happened to look up, and I saw the lines where the rafters are on the roof, and that was a concern," she said.

She called the Fire Department to check it out, and the house passed inspection.

"They got an infrared, and they were able to see the rafters, and they said there were no cracks or breaks," she said.

Officials across the state are urging people to pay close attention to the snow loads on their roofs.

"Basically what you want to look out for is if you have any bowing of the structure, any cracking or popping noises, any cracking of the sheetrock on the inside of the house," said Nashua Assistant Fire Chief Steven Galipeau. "There could be some concerns. If it's a flat roof, you want to make sure any roof drains are clear."

Residents were also urged to use caution in clearing their roofs.

"You can get a roof rake, a telescoping roof rake to safely remove that from the roof if they have these concerns," said Merrimack Assistant Fire Chief Brian Borneman. "We're really cautious about anybody trying to climb up on a roof, obviously, on ice and snow."

Authorities said side vents and chimney caps should also be clear, and residents should make sure no exits are blocked.

Heavy snow on the roof of a Portsmouth office building forced firefighters to evacuate everyone inside. Employees of the large, flat-roofed office building in Griffin Park reported some bowing in the ceiling.

Firefighters checked the roof and called in a structural engineer. It was deemed safe about an hour later, and employees were allowed back inside.